Valve body welding equipment for EGR valve production

Abstract

The invention relates to the technical field of valve body welding, and discloses valve body welding equipment for EGR valve production, which comprises a machine table, an operating frame is fixedly mounted at the top of the machine table, a valve body is movably arranged on the operating frame, and a driving mechanism is arranged on the side surface of the operating frame; a welding mechanism and a material stripping mechanism are arranged on the two sides of the operation frame correspondingly, an expansion plate is arranged at the bottom of the lower hanging rod, one end of the expansion plate is slidably connected with the operation frame, a sliding rod is elastically connected to the bottom of the end, away from the end connected with the operation frame, of the expansion plate, and the sliding rod is slidably connected with the operation frame. The expansion plate is connected with the lower hanging rod in an abutting mode, an angle folding strip is arranged on the side face of the expansion plate, the angle folding strip is fixedly connected with the operation frame, the angle folding strip is connected with the push rod in an abutting mode, during welding, a laser welding head can conveniently penetrate through a through hole to stretch into the butt joint position of the valve element and the telescopic rod, the butt joint position is welded, automatic welding can be achieved, and the welding efficiency is improved. The laser welding head is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body welding, and specifically to a valve body welding device for the production of EGR valves. Background Art

[0002] The EGR valve is a key component in the exhaust gas recirculation system. The EGR valve controls the amount of exhaust gas recirculation, allowing a portion of the exhaust gas to be reintroduced into the intake manifold, mixed with fresh air, and then enter the cylinder to participate in combustion. When the engine is operating, the electronic control unit precisely controls the opening degree of the EGR valve according to the engine operating conditions, such as engine speed, load, water temperature, oxygen sensor signal, etc., to regulate the flow rate of exhaust gas recirculation;

[0003] For an integrated EGR valve body with a horizontal pipe on the outside, since during the operation of the EGR valve, the valve core only seals the through-hole at the valve body and the horizontal pipe, in terms of the design process, the displacement distance range of the valve core is only on the upper and lower sides of the through-hole. Therefore, in order to achieve precise control and improve the response speed, the telescopic length of the telescopic rod is adapted to the moving distance of the valve core. As a result, during the welding process, welding needs to be carried out inside the valve body, but the space at the through-hole is small, which is not convenient for operation and observation, and easily affects the welding effect and quality, thus making it inconvenient to use the valve body. For this reason, we have proposed a valve body welding device for the production of EGR valves to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a valve body welding device for the production of EGR valves to solve the problems raised in the above background art. To achieve the above purpose, the present invention provides the following technical solutions: It includes a machine table, on the top of which an operation frame is fixedly installed. A valve body body is movably arranged on the operation frame. A driving mechanism is arranged on the side of the operation frame, and a welding mechanism and a blanking mechanism are respectively arranged on both sides of the operation frame;

[0005] The welding mechanism includes a welding frame slidably installed on the operation frame. Clamping arms are symmetrically arranged on both sides of the welding frame. The clamping arms are slidably connected to the welding frame. The ends of the clamping arms close to each other are respectively fixedly connected with pneumatic limiting discs. Springs are sleeved on the clamping arms. A mounting plate is fixedly connected to the surface of one of the pneumatic limiting disc clamps;

[0006] The bottom of the mounting plate is slidably connected with a slider. A laser welding head is slidably connected to the slider. One end of the laser welding head is rotatably connected with a push rod. The push rod is slidably connected to the pneumatic limiting disc. A lower hanging rod is fixedly connected to the bottom of the pneumatic limiting disc;

[0007] The bottom of the hanging rod is provided with an expansion plate. One end of the expansion plate is slidably connected to the operation frame. The bottom of the end of the expansion plate far from the operation connection is elastically connected with a sliding rod. The sliding rod is slidably connected to the operation frame. The expansion plate abuts against the hanging rod. A folding angle strip is arranged on the side surface of the expansion plate. The folding angle strip is fixedly connected to the operation frame. The folding angle strip abuts against the push rod.

[0008] Preferably, a disc is rotatably connected to the bottom of the welding frame. Clamping blocks are symmetrically arranged on both sides of the top of the disc. The clamping blocks are elastically connected to the disc. A first gear is fixedly connected to the bottom of the disc. A second rack is meshed with the side surface of the first gear. An installation frame is fixedly connected to the end of the operation frame. A valve core notch is formed through one side of the installation frame.

[0009] Preferably, the driving mechanism includes a driving motor. A worm is rotatably connected to the output end of the driving motor. A worm gear is meshed with the side surface of the worm. A toothed disc is arranged above the worm gear. There are two toothed discs and they are meshed with each other. One of the toothed discs is fixedly connected to the worm gear.

[0010] Preferably, missing gears are fixedly connected to the tops of the two toothed discs. The two missing gears are arranged staggeredly. Rack bars are movably meshed with the sides close to the operation frame. The rack bars are slidably connected to the operation frame and fixedly connected to the welding frame.

[0011] Preferably, the blanking mechanism includes a receiving frame fixedly connected to the end of the operation frame. A check plate is hinged to one end of the top of the receiving frame. A resilient sheet is arranged at the bottom of the check plate. The top of the resilient sheet abuts against the check plate. A stop bar is slidably connected to the other end of the receiving frame.

[0012] Preferably, a third rack is slidably connected to the receiving frame. A notched tooth ring is meshed with the side surface of the third rack. A rotating shaft is arranged inside the notched tooth ring. A second gear is fixedly connected to the bottom of the rotating shaft. L-shaped rack bars are meshed with both sides of the second gear. The L-shaped rack bars are slidably connected to the receiving frame and abut against the hanging rod.

[0013] Preferably, a buckling hole is formed in the top of the L-shaped rack bar. Cylinders are arranged on the inner walls of both sides of the operation frame. A buckling block adapted to the buckling hole is arranged at the top of the cylinder. The buckling block is movably clamped with the buckling hole.

[0014] Preferably, a tension spring is fixedly connected to the surface of the rotating shaft. One end of the tension spring far from the rotating shaft is fixedly connected to a clamping plate. The clamping plate is hinged to the rotating shaft. The clamping plate is movably clamped with the notched tooth ring.

[0015] Preferably, a steel belt is provided at the top of the rotating shaft. One end inside the steel belt is fixedly connected to the rotating shaft, and one end outside the steel belt is fixedly connected to the material receiving frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, through the provided welding mechanism, before welding starts, the valve core and the valve body are respectively placed in the corresponding areas on the mounting frame. When the pneumatic fixture passes through the expansion plate, it is automatically opened. After corresponding to the hole positions of the valve body, it automatically retracts to automatically clamp and load the valve body, and keeps the valve core symmetrical with the telescopic rod to prevent the welding position from shifting and improve the welding effect.

[0018] 2. In the present invention, through the provided folding angle strip, during welding, the push rod pushes the laser welding head inward. One of the sliders slides at the bottom of the mounting plate to make the laser welding head rotate with the other non - moving slider as the axis, and the laser welding head slides on the slider to make the end of the laser welding head approach the top of the valve core of the valve body main body, facilitating the laser welding head to pass through the through - hole and extend into the docking part of the valve core and the telescopic rod, and welding this place, which can automatically perform welding and is convenient for operating the laser welding head.

[0019] 3. In the present invention, through the provided material discharging mechanism, after welding is completed, when the valve body passes through the check valve plate, the check valve plate is pressed down and the stop bar is pushed distally. After passing through the check valve plate, the check valve plate automatically rises, and the check valve frame and the stop bar cooperate with each other to limit the valve body, which can automatically remove the valve after the valve body is welded and improve the operation efficiency of the welding process. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the side - view structural schematic diagram of the present invention;

[0022] Figure 3 is the structural schematic diagram of the welding frame, mounting plate and pneumatic limit disk of the present invention;

[0023] Figure 4 is the bottom - view structural schematic diagram of the welding frame of the present invention;

[0024] Figure 5 is the structural schematic diagram of the welding mechanism of the present invention;

[0025] Figure 6 is the present invention Figure 5 the enlarged structural schematic diagram of area A in;

[0026] Figure 7 is the present invention Figure 5Schematic diagram of the enlarged structure of area B in

[0027] Figure 8 This invention Figure 5 Schematic diagram of the enlarged structure of area C in

[0028] Figure 9 Schematic diagram of the structure of the blanking mechanism of this invention;

[0029] Figure 10 Schematic diagram of the unfolded structure of the notched gear ring and the rotating shaft of this invention;

[0030] Figure 11 Schematic diagram of the structure of the valve body of this invention.

[0031] In the figure: 1, machine platform; 2, operation frame; 3, valve body; 4, driving mechanism; 401, driving motor; 402, worm; 403, worm gear; 404, tooth disc; 405, missing gear; 406, rack one; 5, welding mechanism; 501, welding frame; 502, clamping arm; 503, pneumatic limit disc; 504, spring; 505, mounting plate; 506, slider; 507, push rod; 508, laser welding head; 509, lower hanging rod; 510, expansion plate; 511, sliding rod; 512, folding angle bar; 513, disc; 514, clamping block; 515, gear one; 516, rack two; 517, mounting bracket; 518, valve core notch; 6, blanking mechanism; 601, material receiving frame; 602, check valve plate; 603, elastic sheet; 604, stop bar; 605, rack three; 606, notched gear ring; 607, rotating shaft; 608, gear two; 609, L-shaped rack; 610, fastening hole; 611, cylinder; 612, fastening block; 613, tension spring; 614, steel belt; 615, clamping plate. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 6 , the present invention provides a technical solution: including a machine platform 1, an operation frame 2 is fixedly installed on the top of the machine platform 1, a valve body 3 is movably arranged on the operation frame 2, a driving mechanism 4 is arranged on the side of the operation frame 2, and a welding mechanism 5 and a blanking mechanism 6 are respectively arranged on both sides of the operation frame 2;

[0034] The welding mechanism 5 includes a welding frame 501 slidably mounted on the operation frame 2. Clamping arms 502 are symmetrically arranged on both sides of the welding frame 501. The clamping arms 502 are slidably connected to the welding frame 501. Pneumatic limit discs 503 are fixedly connected to the ends of the clamping arms 502 that are close to each other. Springs 504 are sleeved on the clamping arms 502. A mounting plate 505 is fixedly connected to the surface of one of the pneumatic limit discs 503;

[0035] A slider 506 is slidably connected to the bottom of the mounting plate 505. A laser welding head 508 is slidably connected to the slider 506. One end of the laser welding head 508 is rotatably connected to a push rod 507. The push rod 507 is slidably connected to the pneumatic limit disc 503. A hanging rod 509 is fixedly connected to the bottom of the pneumatic limit disc 503;

[0036] An expansion plate 510 is arranged at the bottom of the hanging rod 509. One end of the expansion plate 510 is slidably connected to the operation frame 2. The bottom of the end of the expansion plate 510 far from the operation connection is elastically connected to a sliding rod 511. The sliding rod 511 is slidably connected to the operation frame 2. The expansion plate 510 abuts against the hanging rod 509. A folding angle strip 512 is arranged on the side of the expansion plate 510. The folding angle strip 512 is fixedly connected to the operation frame 2. The folding angle strip 512 abuts against the push rod 507;

[0037] A disc 513 is rotatably connected to the bottom of the welding frame 501. Clamping blocks 514 are symmetrically arranged on both sides of the top of the disc 513. The clamping blocks 514 are elastically connected to the disc 513. A first gear 515 is fixedly connected to the bottom of the disc 513. A second rack 516 is meshed with the side of the first gear 515. A mounting frame 517 is fixedly connected to the end of the operation frame 2. A valve core notch 518 is formed through one side of the mounting frame 517;

[0038] The driving mechanism 4 includes a driving motor 401. The output end of the driving motor 401 is rotatably connected to a worm 402. A worm gear 403 is meshed with the side of the worm 402. A toothed disc 404 is arranged above the worm gear 403. There are two toothed discs 404 and they are meshed with each other. One of the toothed discs 404 is fixedly connected to the worm gear 403;

[0039] Deficient gears 405 are fixedly connected to the tops of the two toothed discs 404. The two deficient gears 405 are arranged in a staggered manner. A first rack 406 is movably meshed with the side close to the operation frame 2 of both of them. The first rack 406 is slidably connected to the operation frame 2 and is fixedly connected to the welding frame 501;

[0040] In this embodiment, as Figure 11As shown, the EGR valve generally consists of a valve body, a valve core, an actuator, and a position sensor. When the valve core and the valve body are welded, for a valve body with a through hole inside, the position where the valve core moves up and down is limited by the through hole, resulting in a limited telescopic length of the telescopic rod of the valve body and being unable to extend outside the valve body. During the welding process, it is necessary to carry out inside the valve body, and it is inconvenient to operate the relative position of the valve core and the telescopic rod during welding;

[0041] In this embodiment, welding by rotating the valve core can make the weld seam evenly heated, and the welding heat source continuously moves relative to the valve core, avoiding the situation of local overheating or insufficient heat, making the weld metal melt fully and evenly, contributing to the formation of a good weld structure, reducing welding defects caused by uneven heat. In addition, welding can be carried out continuously without frequent interruption to adjust the welding position, which can reduce the pause time during the welding process, improve the welding speed, and thus improve production efficiency;

[0042] Please refer to Figures 7 to 11 , the present invention provides a technical solution: the blanking mechanism 6 includes a receiving frame 601 fixedly connected to the end of the operating frame 2. One end of the top of the receiving frame 601 is hinged with a check plate 602. A resilient piece 603 is arranged at the bottom of the check plate 602, and the top of the resilient piece 603 abuts against the check plate 602. The other end of the receiving frame 601 is slidably connected with a stop bar 604;

[0043] A third rack 605 is slidably connected to the receiving frame 601. A notched gear ring 606 is engaged with the side of the third rack 605. A rotating shaft 607 is arranged inside the notched gear ring 606. A second gear 608 is fixedly connected to the bottom of the rotating shaft 607. Two L-shaped racks 609 are engaged with both sides of the second gear 608. The L-shaped racks 609 are slidably connected with the receiving frame 601 and abut against the lower hanging rod 509;

[0044] A buckling hole 610 is opened at the top of the L-shaped rack 609. Cylinders 611 are arranged at the inner walls on both sides of the operating frame 2. A buckling block 612 adapted to the buckling hole 610 is arranged at the top of the cylinder 611. The buckling block 612 is movably clamped with the buckling hole 610;

[0045] A tension spring 613 is fixedly connected to the surface of the rotating shaft 607. One end of the tension spring 613 away from the rotating shaft 607 is fixedly connected with a clamping plate 615. The clamping plate 615 is hinged with the rotating shaft 607, and the clamping plate 615 is movably clamped with the notched gear ring 606;

[0046] A steel belt 614 is arranged at the top of the rotating shaft 607. One end of the inner side of the steel belt 614 is fixedly connected with the rotating shaft 607, and one end of the outer side of the steel belt 614 is fixedly connected with the receiving frame 601;

[0047] The usage method and advantages of the present invention: The valve body welding equipment for producing an EGR valve works as follows:

[0048] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 as shown in

[0049] S1: Before welding starts, the operator places the valve core at the notch 518 of the valve core. The surface of the valve core fits with the arc surface of the notch 518 of the valve core. Then, the valve body body 3 is placed on the mounting frame 517. The through hole at the valve core installation position of the valve body body 3 is symmetrical with the axis of the valve core. Subsequently, the driving motor 401 is started. The worm 402 drives the worm gear 403 to rotate. The worm gear 403 drives one of the toothed disks 404 to rotate, and the other toothed disk 404 rotates synchronously. When the toothed disk 404 rotates, it drives the missing gear 405 to rotate synchronously. The two missing gears 405 are arranged staggeredly and rotate. One of the missing gears 405 meshes with the first rack 406, and the other missing gear 405 does not mesh with the first rack 406. When one of the missing gears 405 disengages from the first rack 406, the other missing gear 405 re-engages with the first rack 406. When the missing gear 405 meshes with the first rack 406, the first rack 406 slides to one side on the operating frame 2, and the welding frame 501 moves synchronously;

[0050] S2: During the process of the welding jig 501 approaching the valve body main body 3, the lower hanging rod 509 abuts against the surface of the expansion plate 510, causing the lower hanging rod 509 to open outward under the guidance of the trajectory set by the expansion plate 510, synchronously moving the pneumatic limit disc 503 outward, driving the clamping arm 502 to slide on the welding jig 501, compressing the spring 504, and gradually expanding the distance between the two pneumatic limit discs 503. When approaching the valve body main body 3, the lower hanging rod 509 disconnects from the abutting state with the expansion plate 510, enabling the spring 504 to be quickly released. The two pneumatic limit discs 503 wrap the through holes on both sides of the valve body main body 3, and the pneumatic limit discs 503 start to clamp the outer wall of the valve body main body 3. At the same time, the mounting plate 505 extends into the interior of the valve body. At this time, the disc 513 drives the two clamping blocks 514 to synchronously clamp the valve core placed at the valve core notch 518, and is axially symmetric with the through hole at the valve core installation position of the valve body main body 3. At this time, the first rack 406 disconnects from the meshing state with one of the missing gears 405 and re-engages with the other missing gear 405, causing the first rack 406 to move in the reverse direction, thereby driving the welding jig 501 to move in the opposite direction synchronously. During the process, the lower hanging rod 509 pushes the side of the expansion plate 510 with the slide rod 511 installed outward by a certain distance, and then through the elastically connected slide rod 511, the expansion plate 510 returns to its original position. When one end of the push rod 507 on the mounting plate 505 touches the angled strip 512, it is pushed inward by the angled strip 512, causing the push rod 507 to push the laser welding head 508 inward and keep it in this state for a certain distance. During the inward pushing process, one of the sliders 506 slides at the bottom of the mounting plate 505, causing the laser welding head 508 to rotate around the other non-moving slider 506 as the axis, and the laser welding head 508 slides on the slider 506, causing the end of the laser welding head 508 to approach the top of the valve core of the valve body main body 3 and be located at the docking position of the telescopic rod and the valve core of the valve body, and weld this position. During the welding process, the first gear 515 meshes with the second rack 516, driving the disc 513 to rotate, causing the valve core to rotate during the welding process, facilitating the improvement of the welding effect and facilitating welding inside the valve body main body 3;

[0051] S3: After welding is completed, the push rod 507 disconnects from the angled strip 512. At this time, the push rod 507 automatically returns to its original position, driving the laser welding head 508 to return. The first rack 406 drives the welding frame 501 to approach the material receiving frame 601. When the valve body 3 passes through the check valve plate 602, the check valve plate 602 is pressed down, and the elastic piece 603 is compressed, and the stop bar 604 is pushed distally. After passing through the check valve plate 602, the check valve plate 602 automatically rises. The check valve plate 602 and the stop bar 604 cooperate with each other to limit the valve body 3. And during the movement of the welding frame 501, the third rack 605 is pushed, driving the notched gear ring 606 to rotate. The missing teeth inside the notched gear ring 606 catch the clamping plate 615 and drive the rotating shaft 607 to rotate in the same direction. The second gear 608 at the bottom of the rotating shaft 607 rotates synchronously, driving the two L-shaped racks 609 meshing with it to move to both sides respectively, pushing the lower hanging rod 509 at the bottom of the pneumatic limiting disc 503 outwards. Subsequently, during the process, the buckling holes 610 formed on the L-shaped rack 609 pass through the buckling blocks 612, and then the buckling blocks 612 automatically fall to buckle the L-shaped rack 609. At this time, the mounting plate 505 is removed from the inside of the valve body 3, completing the welding of the valve body 3. The rack continues to drive the welding frame 501 to move to the other side, and the steel belt 614 is pulled into a wound state. At this time, the cylinder 611 is started to push up the buckling block 612, so that the buckling block 612 disconnects from the buckling state with the L-shaped rack 609, and the steel belt 614 is automatically released, causing the rotating shaft 607 to rotate in the reverse direction to return to its original position.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve body welding device for EGR valve production, characterized in that, It includes a machine platform (1), on the top of which an operation frame (2) is fixedly installed. A valve body (3) is movably arranged on the operation frame (2). A driving mechanism (4) is arranged on the side of the operation frame (2). A welding mechanism (5) and a blanking mechanism (6) are respectively arranged on both sides of the operation frame (2). The welding mechanism (5) includes a welding frame (501) slidably installed on the operation frame (2). Clamping arms (502) are symmetrically arranged on both sides of the welding frame (501). The clamping arms (502) are slidably connected to the welding frame (501). Pneumatic limiting discs (503) are fixedly connected to the ends of the clamping arms (502) close to each other. Springs (504) are sleeved on the clamping arms (502). An installation plate (505) is fixedly connected to the surface of one of the pneumatic limiting discs (503). A slider (506) is slidably connected to the bottom of the installation plate (505). A laser welding head (508) is slidably connected to the slider (506). One end of the laser welding head (508) is rotatably connected to a push rod (507). The push rod (507) is slidably connected to the pneumatic limiting disc (503). A hanging rod (509) is fixedly connected to the bottom of the pneumatic limiting disc (503). An expansion plate (510) is arranged at the bottom of the hanging rod (509). One end of the expansion plate (510) is slidably connected to the operation frame (2). The bottom of the end of the expansion plate (510) far from the connection with the operation is elastically connected to a sliding rod (511). The sliding rod (511) is slidably connected to the operation frame (2). The expansion plate (510) abuts against the hanging rod (509). A folding angle strip (512) is arranged on the side of the expansion plate (510). The folding angle strip (512) is fixedly connected to the operation frame (2). The folding angle strip (512) abuts against the push rod (507).

2. The valve body welding equipment for EGR valve production according to claim 1, characterized in that: A disc (513) is rotatably connected to the bottom of the welding frame (501). Clamping blocks (514) are symmetrically arranged on both sides of the top of the disc (513). The clamping blocks (514) are elastically connected to the disc (513). A gear one (515) is fixedly connected to the bottom of the disc (513). A rack two (516) is meshed with the side of the gear one (515). An installation frame (517) is fixedly connected to the end of the operation frame (2). A valve core notch (518) is formed through one side of the installation frame (517).

3. The valve body welding equipment for EGR valve production according to claim 1, characterized in that: The driving mechanism (4) includes a driving motor (401). A worm (402) is rotatably connected to the output end of the driving motor (401). A worm gear (403) is meshed with the side of the worm (402). A toothed disc (404) is arranged above the worm gear (403). There are two toothed discs (404) and they are meshed with each other. One of the toothed discs (404) is fixedly connected to the worm gear (403).

4. The valve body welding equipment for EGR valve production according to claim 3, characterized in that: A missing gear (405) is fixedly connected to the top of each of the two toothed discs (404). The two missing gears (405) are arranged staggeredly, and a first rack (406) is movably engaged with one side close to the operating frame (2). The first rack (406) is slidably connected to the operating frame (2) and fixedly connected to the welding frame (501).

5. The valve body welding equipment for EGR valve production according to claim 1, characterized in that: The blanking mechanism (6) includes a material receiving frame (601) fixedly connected to the end of the operating frame (2). One end of the top of the material receiving frame (601) is hinged with a check plate (602). A elastic sheet (603) is arranged at the bottom of the check plate (602). The top of the elastic sheet (603) abuts against the check plate (602). A stop bar (604) is slidably connected to the other end of the material receiving frame (601).

6. The valve body welding equipment for EGR valve production according to claim 5, characterized in that: A third rack (605) is slidably connected to the material receiving frame (601). A notched gear ring (606) is engaged with the side of the third rack (605). A rotating shaft (607) is arranged inside the notched gear ring (606). A second gear (608) is fixedly connected to the bottom of the rotating shaft (607). The second gear (608) is engaged with two L-shaped racks (609) on both sides. The L-shaped racks (609) are slidably connected to the material receiving frame (601) and abut against the lower hanging rod (509).

7. The valve body welding equipment for producing an EGR valve according to claim 6, characterized in that: A buckling hole (610) is formed at the top of the L-shaped rack (609). Cylinders (611) are arranged at the inner walls on both sides of the operating frame (2). A buckling block (612) adapted to the buckling hole (610) is arranged at the top of the cylinder (611). The buckling block (612) is movably clamped with the buckling hole (610).

8. The valve body welding equipment for EGR valve production according to claim 6, characterized in that: A tension spring (613) is fixedly connected to the surface of the rotating shaft (607). One end of the tension spring (613) away from the rotating shaft (607) is fixedly connected to a clamping plate (615). The clamping plate (615) is hinged to the rotating shaft (607). The clamping plate (615) is movably clamped with the notched gear ring (606).

9. The valve body welding equipment for EGR valve production according to claim 8, characterized in that: A steel belt (614) is arranged at the top of the rotating shaft (607). One end of the inner side of the steel belt (614) is fixedly connected to the rotating shaft (607). One end of the outer side of the steel belt (614) is fixedly connected to the material receiving frame (601).

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